/Engine/Plugins/Online/OnlineSubsystem/Source/Public/Interfaces/OnlinePurchaseInterface.h
struct FLineItemInfo : public [FJsonSerializable](API\Runtime\Json\Serialization\FJsonSerializable)
FString
ItemName
The platform identifier of this purchase type
FUniqueEntitlem...
UniqueId
Unique identifier representing this purchased item (the specific instance owned by this account)
FString
ValidationInfo
Platform-specific opaque validation info (required to verify UniqueId belongs to this account)